brinkereoff



(No Model.) 2 Sheets-Sheet 1.

W. M. BRINKERHOP-F.

- HARROW.

N0. 392,311i Patented'Nom 6, 1888.

(No Model.) 2 Shets-Sheet 2.

W. M.-BRINKERHOFP.

v I HARROW.

No. 392,311. Patented Nov. 6, 1888.

1 1mm- 8 I IILWH gm/wM Sf W mmrgg NITED STATES PATENT ()rrice.

WARREN M. BRINKERHOFF, OF AUBURN, NE? YORK.

HARROW.

SPECIFICATION forming part of Letters Patent No. 392,311, dated November 6, 1888.

Application filed July 31, 1888. Serial No. 281,491. (No model.)

To all whom it may concern:

Be it known that l, WARREN M. BRINKER- HOFF, a citizen of the United States, residing at Auburn, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Harrows; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to spring-tooth harrows, and more especially to that class of such barrows in which the main body of the frame is held a short distance above the ground to provide clearance-spacesbetween the teeth to prevent the clogging of the harrow and to provide guards for the teeth; and it consists of improved means for accomplishing these results, whereby the harrow is enabled to ride easily over the ground, the points exposed are adapted to sustain wear with little injury thereto, and other advantageous results are secured.

In most of the barrows in which the teethguards are employed the means for securing the teeth are so located as to be either subject to wear from contact with the earth or they are so located that wet or damp earth will accumulate around them, so that they will become rusted, and the adjustment or removal of the teeth is rendered tedious and difficult. These defects are avoided by my invention, several forms in which I have contemplated embodying the same being shown in the accompanying drawings, in which- Figure 1 is a plan view of a draft and cross bar at the point of intersection depressed to form a tooth-guard,with a shoe for protecting the tooth-holding devices in position. Fig. 2 is a view of the same with the tooth-clip in position. Fig. 3 is a perspective view of the construction shown in Fig. 2, with a tooth in position in the clip. Fig. 4 is a perspective view of a tooth-guard of rounded form applied beneath the harrow-frame at a point of intersection of the frame-bars. Fig. 5 is a like view with a modified form of such guard. Fig. 6is a section of the guard shown in Fig. 4. Fig. 7 is a section of a modified form of such guard. Fig. 8 is a top or plan View of still another form of guard, and Fig. 9 is a view of a tooth-clip with a modified form of front and sides of the pocket.

the shoe shown in the first three figures forming a part thereof. Fig. 10 is a side view of the same.

In the figures, A is a draft-bar, and B a crossbar, of a metallic barrow-frame. In the first three figures of the drawings these bars are depressed at their point of intersection to form a tooth-guard. Such guard is effective to protect the tooth from injurious contact with heavy andimmovable obstacles; but when the tooth-attaching means are located at the bottom of this depression or pocket the spaces between the bars permit damp or wet earth to be forced in and accumulate around said attaching means. In order to prevent this, I employ ashoe, O, which is so constructed as to close the openings between the bars at the This shoe has preferably a base fitting the intersecting bars and an outwardly and upwardly extending web or wall conforming to the form of the bars, with outward projections fittingbetween the bars. This upper edge of this web or wall is preferably or substantially in the same plane as the upper surface of the main portion of the bars; but instead of a continuous wall or web I may make the wall in sections, each section just fitting between the two adjacent bars and engaging the same in such manner that when secured in position they together form an effective protective shoe for the tooth-attaching devices. The relative position of this shoe and the tooth-clip D (shown in Fig. 2) and the parts with a tooth, E, secured in the clip are shown in perspective in Fig. 3.

Instead of making the tooth-clip and the shoe 0 separate, they may be secured together or-made' in one piece. \Vhen these parts are secured together and in proper relation, they form a tooth-guard with a rounded under surface, which will pass easily over the ground with which it comes in contact.

In Figs. 4. to 8 I have shown a guard, 0, having a rounded under surface adapted to be used with aharrow-frame composed of straight fiat bars. This guard is of a hollow or cuplike form with a projecting rim, 0, by which the guard is attached to the draft and cross bars. As one of the bars is placed beneath the other at the point of intersection, the upper edge of the guard is provided with two notches on opposite sides to receive the under bar, permitting the rim to come in contact with the under surface of the upper bar. In this figure the tooth-clip is shown as secured to the upper side of the bars at their point of intersection; but the clip may, when desired, be secured beneath the bars.

The guard 0, (shown in Fi 5,) instead of being substantially circular in horizontal section, is substantially semicircular, the open side of the guard turned at the rear. This guard maybe ofoetagonal form and may be of greater or less extent than half of a circular or polygonal figure. It is attached to the bars of the frame in a similar manner to the guard shown in Fig. t. In constructi ng these guards it is desirable that the bottom 1; be made quite thick to resist wear, as shown in Fig. 6, and I may also make the front wall, a, of greater thickness than the sides for the same purpose.

In Fig. 8 I have shown a construct-ion of guard having a rounded under side, and to enable the same to easily divide and pass through loose material on the surface of the ground the front of such guard is made ofa blunt-pointed shape.

In Figs. 9 and lo I have shown a tooth-clip, I), which is adapted for use with a frame in which the teeth-guards are formed by depress ing the bars of the frame. It has rigidly attached to or east with it a projection, D", which is adapted to fit between the two bars forming the front of the pocket and form a closed front to prevent the admission of small stones and earth into the pocket.

in Fig. 7 I have shown the guard as having its rear wall provided with an aperture for the exit of water. I may also provide agroove or grooves leading to said orifice, or I may form the bottom inclined from front to rear to conduct the water to said orifice.

\Vhat l elai m, and desi re to secure by Letters Patent, is-

.l. A springtooth harrow with a hollow projection extending below the plane of the main portion of the barrow-frame out of contact with the operative portions of the harrowtceth, forming a pocket within the points of its connection with the main portion of the frame, said projection having a rigid lower portion and being closed in front, substantially as described.

2. A spring barrow-tooth provided with a tooth-guard consisting of a hollow projection extending below the plane of the main portion of the harrow-frame and in advance of the operative portion of the vibrating tooth, said guard having on its forward side a verti- Cally-disposed portion in advance of adjacent side portions, substantially as described.

3. A tootlrguard for harrows, consisting of a hollow projection extending below the plane of the main portion of the frame, having a central portion and adjacent side portions, in combination with a tooth-clip the securingbolt of which is within the plane ofsaid front and side portions, substantially as described.

4-. A. tooth-guard for harrows, consisting of a hollow projection extending below the main portions of the harrow-frame and having its earth'engaging portions adapted to sustain greater wear than the other portions, substantially as described.

5. A tooth-guard for harrows, consisting of a hollow projection extending below the main portion of the barrow-frame and having a forward wall thickened to sustain wear, substantially as described.

6. A tooth guard for harrows, consisting of a hollow projection extending below the main body of the frame, having a central forward portion and adjacent side portions, in combination with a tooth clip located within said projection, substantially as described.

7. In combination with theintersccting bars of a harrow, depressed adjacent to the point of intersection, and a tooth-cliplocated in said depression, a web or wall between two adja cent bars, substantially as described.

8. A tooth-clip for spring-tooth harrows, having a web or wall connected therewith adapted to close the space between two of the intersecting bars ofthe barrow-frame adjacent to the point of intersection, substantially as described.

In testimony whereof i at'tix mysignaturein 5 presence of two witnesses.

\VARREN' M. IHtINKERHOFF. 

